| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved. |
| * Copyright 2007 Nuova Systems, Inc. All rights reserved. |
| */ |
| |
| #ifndef _WQ_ENET_DESC_H_ |
| #define _WQ_ENET_DESC_H_ |
| |
| /* Ethernet work queue descriptor: 16B */ |
| struct wq_enet_desc { |
| __le64 address; |
| __le16 length; |
| __le16 mss_loopback; |
| __le16 header_length_flags; |
| __le16 vlan_tag; |
| }; |
| |
| #define WQ_ENET_ADDR_BITS 64 |
| #define WQ_ENET_LEN_BITS 14 |
| #define WQ_ENET_LEN_MASK ((1 << WQ_ENET_LEN_BITS) - 1) |
| #define WQ_ENET_MSS_BITS 14 |
| #define WQ_ENET_MSS_MASK ((1 << WQ_ENET_MSS_BITS) - 1) |
| #define WQ_ENET_MSS_SHIFT 2 |
| #define WQ_ENET_LOOPBACK_SHIFT 1 |
| #define WQ_ENET_HDRLEN_BITS 10 |
| #define WQ_ENET_HDRLEN_MASK ((1 << WQ_ENET_HDRLEN_BITS) - 1) |
| #define WQ_ENET_FLAGS_OM_BITS 2 |
| #define WQ_ENET_FLAGS_OM_MASK ((1 << WQ_ENET_FLAGS_OM_BITS) - 1) |
| #define WQ_ENET_FLAGS_EOP_SHIFT 12 |
| #define WQ_ENET_FLAGS_CQ_ENTRY_SHIFT 13 |
| #define WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT 14 |
| #define WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT 15 |
| |
| #define WQ_ENET_OFFLOAD_MODE_CSUM 0 |
| #define WQ_ENET_OFFLOAD_MODE_RESERVED 1 |
| #define WQ_ENET_OFFLOAD_MODE_CSUM_L4 2 |
| #define WQ_ENET_OFFLOAD_MODE_TSO 3 |
| |
| static inline void wq_enet_desc_enc(struct wq_enet_desc *desc, |
| u64 address, u16 length, u16 mss, u16 header_length, |
| u8 offload_mode, u8 eop, u8 cq_entry, u8 fcoe_encap, |
| u8 vlan_tag_insert, u16 vlan_tag, u8 loopback) |
| { |
| desc->address = cpu_to_le64(address); |
| desc->length = cpu_to_le16(length & WQ_ENET_LEN_MASK); |
| desc->mss_loopback = cpu_to_le16((mss & WQ_ENET_MSS_MASK) << |
| WQ_ENET_MSS_SHIFT | (loopback & 1) << WQ_ENET_LOOPBACK_SHIFT); |
| desc->header_length_flags = cpu_to_le16( |
| (header_length & WQ_ENET_HDRLEN_MASK) | |
| (offload_mode & WQ_ENET_FLAGS_OM_MASK) << WQ_ENET_HDRLEN_BITS | |
| (eop & 1) << WQ_ENET_FLAGS_EOP_SHIFT | |
| (cq_entry & 1) << WQ_ENET_FLAGS_CQ_ENTRY_SHIFT | |
| (fcoe_encap & 1) << WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT | |
| (vlan_tag_insert & 1) << WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT); |
| desc->vlan_tag = cpu_to_le16(vlan_tag); |
| } |
| |
| static inline void wq_enet_desc_dec(struct wq_enet_desc *desc, |
| u64 *address, u16 *length, u16 *mss, u16 *header_length, |
| u8 *offload_mode, u8 *eop, u8 *cq_entry, u8 *fcoe_encap, |
| u8 *vlan_tag_insert, u16 *vlan_tag, u8 *loopback) |
| { |
| *address = le64_to_cpu(desc->address); |
| *length = le16_to_cpu(desc->length) & WQ_ENET_LEN_MASK; |
| *mss = (le16_to_cpu(desc->mss_loopback) >> WQ_ENET_MSS_SHIFT) & |
| WQ_ENET_MSS_MASK; |
| *loopback = (u8)((le16_to_cpu(desc->mss_loopback) >> |
| WQ_ENET_LOOPBACK_SHIFT) & 1); |
| *header_length = le16_to_cpu(desc->header_length_flags) & |
| WQ_ENET_HDRLEN_MASK; |
| *offload_mode = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| WQ_ENET_HDRLEN_BITS) & WQ_ENET_FLAGS_OM_MASK); |
| *eop = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| WQ_ENET_FLAGS_EOP_SHIFT) & 1); |
| *cq_entry = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| WQ_ENET_FLAGS_CQ_ENTRY_SHIFT) & 1); |
| *fcoe_encap = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| WQ_ENET_FLAGS_FCOE_ENCAP_SHIFT) & 1); |
| *vlan_tag_insert = (u8)((le16_to_cpu(desc->header_length_flags) >> |
| WQ_ENET_FLAGS_VLAN_TAG_INSERT_SHIFT) & 1); |
| *vlan_tag = le16_to_cpu(desc->vlan_tag); |
| } |
| |
| #endif /* _WQ_ENET_DESC_H_ */ |
